Zimmermann 100.3380.75 Disc Brake Rotor - Front

Zimmermann Formula Z Front Brake Rotor

The Zimmermann Formula Z disc brake rotor is built for high-load braking on performance-oriented Audi applications. This two-piece, floating-mount rotor is engineered for stable braking response, improved heat management, and a clean coated finish for corrosion resistance.

Key Features

• Part number 100.3380.75
• Two-piece brake disc with Alu hub floating construction
• Alloyed / high-carbon machining for demanding braking conditions
• Coated surface for added corrosion protection
• ECE R90 approved
• 400 mm outer diameter, 38 mm thickness, 35.0 mm minimum thickness
• 6/5 hole arrangement, 112 mm bolt circle, 68 mm hub bore
• Front axle application for select Audi A6, A6 Quattro, A7, A7 Quattro, A8 Quattro, S6, S7, and S8 models

Detailed Description

Zimmermann 100.3380.75 is a front brake rotor designed for Audi vehicles that use the larger 400 x 38 mm braking package. The floating two-piece design allows the rotor to expand more evenly under thermal load, helping maintain braking consistency during repeated stops and spirited driving. The coated finish supports long-term appearance and corrosion resistance, while the high-carbon alloyed construction addresses the higher heat and stress levels seen on tuned or heavier chassis setups. This rotor is a direct-fit solution for select Audi A6, A6 Quattro, A7, A7 Quattro, A8 Quattro, S6, S7, and S8 front applications with the correct PR code.

This part cross-references Gates 18645 for the same application.

What It Helps Address

• Brake fade during repeated high-temperature stops
• Rotor distortion from heavy braking loads
• Heat cracking in demanding front axle use
• Corrosion on exposed rotor surfaces
• Fitment issues on vehicles requiring the 400 x 38 mm front brake setup

Installation Notes and Tips

Verify PR number and brake package before ordering. This rotor is listed for front use on select Audi models, including 2012-2013 Audi A6, 2015-2016 Audi A6, 2018 Audi A6, 2009-2010 Audi A6 Quattro, 2016 Audi A6 Quattro, 2018 Audi A6 Quattro, 2016-2017 Audi A7 Quattro, 2016 Audi A7, 2014 and 2016 Audi S6, 2013-2014 Audi S7, 2016 Audi S7, 2013-2016 Audi S8, and 2011-2018 Audi A8 Quattro. Confirm hub bore, bolt circle, and rotor thickness match the vehicle’s brake specification before installation.

Quality Assurance

Zimmermann manufactures this rotor to ECE R90 standards and supplies it with a coated surface finish for corrosion resistance. The Formula Z design focuses on stable braking performance under mechanical and thermal load, making it a strong OE-style replacement for performance Audi brake systems.